Translation of "rasteren" into English

To create the illusion of varying shades of gray on a monochrome display or printer or of additional colors on a color display or printer.

A method to display a range of colors with a limited palette. Each pixel on the source image is represented by multiple pixels (usually a 2x2 square) on the destination image. From a distance, the eye blends the multiple pixels into one color that has more shades than the original palette. The techniques results in a better visual appearance than the removal of low precision bits.